Improvement in stove-grates



UNITED STATES PATENT OEEICEo ALBERT BROWN, OF TROY, NEW YORK.

IMPROVEMENT IN STOVE-G RATES.

Specification forming part of Letters Patent No. 34,731, dated March 25, 1862.

To all whom it may concern.-

Be it known that I, ALBERT BROWN, of Troy, in the county of Rensselaer and State of New York, have invented a new and Improved Grate for Stoves and Furnaces; and I do hereby declare that the following is afull, clear, and exact description of the same, ref erence being had to the accompanying drawings, making a part of this specification, in which- V Figure lis a plan or top view of my invention; Fig. 2, a transverse section of the same, taken in the line fr :r of Fig. 1; Fig. 3,a transverse section of the same, taken in the lineg/ y; and Fig. 4, an enlarged transverse section of the same, taken in the line z a.

Similar letters of reference indicate corresponding parts in the several iigures.

The Object of this invention is to obtain a grate for stoves and furnaces which will admit of being readily shaken or operated and without being` liable to be obstructed or clogged by clinkers-ma contingency of frequent occurrence with ordinary grates.

The invention also has for its object durability, the warping of the grate-frame by eX- cessive heat being, it is believed, fully obviate To enable those skilled in the art to full lunderstand and construct my invention, I will proceed to describe it.

A represents a cast-metal frame of rectangular form, a a being the two longitudinal bars and b b the end bars. This frame is cast in one piece and is fitted in the bottom of the fire-chamber. The longitudinal bars a a of the frame A are cast with a longitudinal rib c at their under sides, and the upper surfaces of said bars are provided with a longitudinal rib CZ at their inner edges, said ribsbeing also cast with the bars. The ribs CZ CZ are not in one continuous piece. They are divided at intervals by recesses e, as shown clearly in Fig. 1, said recesses extending a short distance into the bars a. The fire-brick of the {ire-chamber rests on the frame A and is flush with the ribs d, as indicated by the dotted lines in Fig. 4.

In consequence of having the ribs d cZof the bars a a divided by the recesses e, the barsc c are prevented from bulging out under the action of the heat to which they are subjected. If the bars a a were solid throughout their entire length, they would in expanding bow or project toward the iire-chamber, as indicated by the dotted lines in Fig. l. The recesses e, however, admit of a certain degree of longitudinal contraction at the inner sides of the bars a and obviate this diiiiculty.

To the under sides of the end bars Z9 h of l the frame A there are secured levers B B', one to each bar. The lever B is secured to its bar b by a pin f, which is cast on said bar and passes throughy the center of the lever, a key g passing through the pin f below the 1e ver, as shown in Fig. 3. The lever B is cast with two recesses h h, to receive,when required, the ends of a forked lever O. (See Figs. 1 and 3.) The lever B is attached to its plate b by a pin h', which is also cast with the plate and passes through an oblong slot i in the lever, as shown by the dotted lines in Fig. l, a key j passing through the pin h, as shown in Fig. 2.

D D represent two grates, which are formed .of transverse bars c, connected with longitudinal bars Z Z. The barsk Z Z are cast in one piece, and the ends of the grates D D are connected to the ends of the levers B B by pinsm m, which are cast on the ends of the grates D and pass through oblong-slots fn in the levers B B', as shown clearly in Figs. 2 andB. The inner sides or" the bars Z Z of the grates D D have lugs 0,0 cast on them--one on each barmand the lugs of the barZ of one grate bear against the bar Z of the other grate, as shown clearly in Fig. 1.

From the above description it will be seen that by actuating the lever C a reciprocating motion will be given the grates D D, the grates moving simultaneously in opposite directions and in right lines. This latter result is attained in consequence of the pins m of the grates iitting in the oblong slots n in the levers B B. The oblong slot t' of lever B', in which slot the pin Zt iits, compensates for the longitudinal expansion of the grates D D and insures the free working of the same, while the lugs o o serve as guides or bearings for the grates D D at their inner edges.

By having the grates D D arranged as shown. they may be operated with the greatest facility and Without the liability of get,-Vv

ting out of repair. The ire also, or rather,

the coals, are efficiently shaken, so as to separate the ashes, and the grates cannot become choked or clogged.

Having thus described my invention, What-I claim as new, and desi-re to secure by Letters l Patent, is-

l. The arrangement of the transverse -1 barred grates D and studs m with the slotted pivoted levers B B, as herein shown and described.

2. The4 arrangement of the recesses e upon the sides d, as and for the purpose herein shown and described.

ALBERT BROWN.

Witnesses CALviN GREEN,v WM. A'. SMITH.` 

